Can die cast lock parts be post-machined and plated?

Can Die Cast Lock Parts Be Post-Machined and Plated?

Post-Machining Requirements for Lock Components

Die cast lock parts—such as cores, cams, housings, and actuators—often require tight tolerances, fine features, or smooth interfaces that cannot be achieved through casting alone. Post-machining ensures critical dimensions for rotating elements, keyways, thread zones, and flat surfaces are precise and repeatable. Both zinc (Zamak) and aluminum die castings can be successfully post-machined with excellent dimensional control.

Typical machining operations include:

• Bore finishing for lock cores and key cylinders

• Thread cutting for internal fastener zones

• Slotting and milling for key interfaces and cam engagement points

• Surface preparation for sealing, plating, or assembly contact areas

Neway utilizes in-house CNC machining to maintain tolerance accuracy and surface finish across high-volume lock components.

Plating Die Cast Lock Parts

After machining, die cast lock parts can be plated to improve corrosion resistance, wear resistance, and surface appearance. Zinc-based alloys like Zamak 3 and Zamak 2 are excellent substrates for plating due to their fine grain structure and high casting quality.

Common plating options include:

• Nickel plating for corrosion resistance and smooth mating surfaces

• Chrome plating for aesthetic finish and surface hardness

• Zinc plating with chromate for secondary corrosion protection

• Copper-nickel-chrome multilayer systems for decorative or marine applications

Plating is often combined with polishing or tumbling to improve surface uniformity before coating.

Process Flow for Machining and Plating

1. Die casting of lock part using Zamak alloy

2. Initial inspection and trimming

3. Precision machining of critical interfaces

4. Optional polishing or vibratory finishing

5. Cleaning and pre-treatment for plating

6. Plating application and post-plate inspection

Neway ensures consistent adhesion and finish quality by coordinating post-processing steps with pre-machined geometries and surface prep.

Neway’s Capabilities for Precision Lock Components

Neway delivers full-service production for lock parts with:

• High-strength zinc die casting using Zamak 2 for wear and load performance

• Integrated tool and die making for keyway precision and mold repeatability

• Close-tolerance machining for cores, threads, and cam interfaces

• Decorative and protective plating services for long-term durability